Calculate energy from a state-of-charge window
Battery capacity multiplied by the percentage-point increase gives battery energy added.
Use usable capacity
Enter the usable battery capacity if that is the figure relevant to your vehicle.
Subtract state of charge
A charge from 20% to 80% adds 60 percentage points, not 80% of capacity.
Keep degradation separate
If actual usable capacity differs from the stated figure, model that as another scenario.